Meter-window structure



Jan. 11 1927.

L. SCHMIDT METER WINDOW STRUCTURE Filed May 18. 1926 E A i 2 k 1 "1* l l WITNESSES: INVENTOR I fidQfiM Lad/W9 Sclzzn/az 1/1/ ATTORNEY Patented Jan. 11, 1927.

UNITED srarss rarssr OFFICE.

LUDVJ'IG- SCI-iIv'IIDl, OF SCEWAZG, FIEAE NUREMBELG, GERMANY, ASSIGNOR TO WEST- INGHOUS E ELECTRIC & I1EA1TUFACTUEETATG COMPANY, A CORPORATION OF I PE NH- SYLVANIA.

METER- INDOW s'ranerunn.

Application filed May 1 8, 1929. Serial Nopllflfimfi, and in Germany May 18, 1925.

My invention relates to window structures and particularly to window structures for electric meters and the like. 7

One object of my invention is to provide a structure, of the above-indicated character, that shall be proof against undetected tampering from the outside thereof.

Another object of my invention is to provide a meter-window structure that shall be simple and durable in construction and economical to manufacture.

A further object of my invention is to provide an effective meter-window structure that shall prevent the admission of dust and other foreign matter to the meter mechanism.

Among the requirements for the window frames of meter casings and similar structures are that they shall be dust proof and that they shall be resistant to attempted entry to such an extent as to require relatively great force, thereby rendering it evident that entry has been made or attempted by breakage of the pane or by mutilation of the parts.

Accordingly, in practicing my invention, I provide a window structure in which a frame for interposition between the casing and the pane is so constructed and disposed in a depression in the casing around the window opening therein and in which the casing around this opening is so inwardly bent as to accomplish the above-mentioned objects.

Figure 1 of the accompanying drawing is an inside face view of one wall of a meter casing embodying a structure constructed in accordance with my invention,

Fig. 2 is a view taken along the line 11-11 of Fig. 1, and

Fig. 3 is an enlarged detailed sectional view of the bottom portion of the device shown in Fig. 2.

As shown, a plate or wall member 1, constituting one wall of a meter casing or similar structure (not shown), is provided with a rectangular opening 2 around the perimeter of which the plate is provided with an offset portion 3 constituting a depression on the inside of the plate in which a frame member 4 is disposed.

Inwardly bent portions 6 of the portion 3 serve to hold the frame t in position. The

latter is provided with a plurality ofinwardly bent clip portions 7 which serve to secure a pane member 8 in position.

By reason of the above-described construction, a shoulder 10 is formed which prevents lateral movement of the frame t in the plane of the plate 1. Thus, any attempted tampering with the device by the use of screw drivers or other implements will require such force as to result in mutilation which will be easily detected by the meter man.

As shown more clearly in Fig. 3, the clips 7 are initially in a dotted-line position in which the pane 8 is admitted freely to the frame d, after which the clips are bent into position, shown in full lines, to hold the pane against the inner flat surface of the portion 6. This construction, by reason of the relatively great sealing-surface engagement between the pane 8 and the portion 6 renders'it diflicult for foreign matter, such as'dust particles, to enter the casing.

Also, by reason of the absence of screws,.

nuts,-and similar elements, the device is extremely economical in construction and easy to assemble.

While I have shown and described a particular form of my invention, changes may be effected therein without departing from the spirit and scope thereof, as set forth in the appended claims.

I claim as my invention:

1. A window structure comprising a sheet material member having a window opening and a portion adjacent to said opening shaped to form a pocket, and a member having a portion held in said pocket and a portion for holding co-operation with a pane element.

2. A window structure comprising a sheetmatcrial member having a window opening and a portion adjacent to said opening of I substantially Ushape, and a member having a portion held in position between the legs of the U and a portion for holding cooperation with a pane element.

3. A window structure comprising a sheetmatcrial member having a Window opening and a portion adjacent to said opening of substantially U-shape, and a member having a portion of substantially U-shape facing 3ppositely to, and having one leg held in po sition between the legs of, said portion ot U-shape for holding co-operation With a pane element.

4. A Window structure comprising a sheetm-aterial'member having a Window opening and bent-over edge portions about said opening, and a pane-supporting i'rame held in position by said bent-edge portions.

5. A Window structure comprising a sheetmaterial member having a Window opening and bent-over edge portions about said opening, and a pane-supporting structure having a frame portion held in position by said bentedge portlons and yleldable cllp portions for holding the pane.

6. A Window structure comprising a sheetmaterial member having a Window opemng, a depressed portion and a bent-over edge portion about said opening, and a panesupporting frame structure disposed in said depressed portion and held in position by said bentover portion.

7. A Window structure comprising a sheetmaterial member having a Window opening, a depressed portion and a bentover edge portion about said opening, and a panesupporting'frame structure disposed in said depressed portion and held in position by said bent-over portion, said frame structure also having a bent-over portion for holding the pane.

In testimony whereof, I have hereunto subscribed my name this 20 day of April, 1926.

LUDWIG SCHMIDT. 

